<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="jquery-1.7.2.min.js"></script>
		<script>
			$(function(){
				$('#btn1').on('click',function(){
					alert(123);
				})
				$('#btn1').on('click.abc mouseover.abc',function(){
					alert('222');
				})
				
				$('#btn2').click(function(){
					$('#btn1').off('.abc');
				})
			})
		</script>
	</head>
	<body>
		<input type="button" id="btn1" value="点击" />
		<input type="button" id="btn2" value="取消222事件" />
	</body>
</html>
